PT - JOURNAL ARTICLE AU - Aurélie Mourot AU - Josiane Bourré-Tessier AU - Valérie Nadon AU - Océane Landon-Cardinal TI - Seronegative Polyarthritis in Association With Anti-NXP2 Antibodies: A Case Series AID - 10.3899/jrheum.220248 DP - 2022 Sep 15 TA - The Journal of Rheumatology PG - jrheum.220248 4099 - http://www.jrheum.org/content/early/2022/09/11/jrheum.220248.short 4100 - http://www.jrheum.org/content/early/2022/09/11/jrheum.220248.full AB - Antinuclear matrix protein 2 (anti-NXP2) are dermatomyositis (DM)-specific autoantibodies.1 A recent metanalysis outlined their association with muscle weakness, myalgia, dysphagia, edema, and calcinosis.2